Vapor stove



3 Sheets-Sheet 1 'dif A. T. SCHMIDT VAPOR STOVE Filed Aug. 24, 1926 @513730. @Mo/:MW

March 17, 1931.

March 17, 1931. A. SCHMIDT VAPOR STOVE Filed Aug. 24, 1926 3 Sheets-Sheet 2 A. T. SCHMIDT VAPOR STOVE March 17, 1931.

Filed Aug. 24, 1926 3 Sheets-Sheet 3 Nm mm Patented Mar. 17, 1931 N UNITED STATES PATENT OFFICE ADOLPH T. SCHMIDT, OF MILWAUKEE, WISCONSIN, ASSIGNOR T A. J'. LINDEMANN & i "HOVEBSON COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN VAPOR STOVE rlhe improvements relate primarily Vto stoves adapted to utilize light hydrocarbons as fuel in which the fuel is pre-heated and vaporized before delivery to the burner to support the combustion, and their objects are, among others, to provide simple, safe and effective means for lighting the burners and for vaporizing and distributing the fuel to the lighter and burners.

The improvements are illustrated in the accompanying drawings, in which Figure 1 is a top plan view of a stove with the grids and central portion of the top removed and certain portions of the other parts broken away; Figure 2 is an elevation, with one end portion in longitudinal section, ofthe vapor generator and transmitter for the lighter, removed from the tank or reservoir; Figure 3 is an elevation of the needle cleanout and regulator for the lighter supply conduit, re-

moved; Figure 4L is a top View of the lighter i cessories,

mixing device detached with parts broken away; Figure `5 isa side view of the lighting device with its valve, mixer and other acportions beingf broken away; Figure 6 is a longitudinal medial section sub stantially onthe line 6 6 of Figure `1, showingthemain valve for controlling the supply of `fuel to the burners, the vaporizer strainer and regulator therefor and parts of the lighter burner in section; Figure 7 is a plan of some of the parts shown in Figure (i and auxiliary valves associated with the main valve for controlling the supplyof vaporized fuel to secondary burners, showing also the burner conduits partly in section with the main burner broken away. Fig. 8 is a section of reservoir 4 taken on line 8-8 of Fig. 1, parts being brokenV away. j D

The top of the stove lmay be of any suitable construction, andhas attached'to the underside thereof and supported thereon fuel supplytubes2 and 3 leading to the tank or reservoir 4 and supplying fuel for the lighter vand theburner combustion respectively.

The vaporizing and vapor transmitting `device for the lighter is mounted on the reservoirand extends down to the bottom thereof. Itconsists of a rigid metallic tube 5 provided 50 with a gasket 6, by which it may be supported in a sleeve (not shown) projecting from the top of the tank and receiving a threaded nut 7 by which said gasket may be securely clamped against the top of the sleeve and made to form an air tight closure, as indicated in Figure 2, a filling of absorbent material 8 extending through said tube 5, and having a portion 8 projecting beyond itslower contracted end 5. The tube 5 has a small opening 9, which will be located in the upper part of the reservoir, above the level of liquid fuel therein, to receive air pressure from the interior of said reservoir, and the reservoir is provided with any suitable means for creating air pressure therein and for maintaining an air cushion at its upper part which will prevent the level of liquid from rising above the air intake 9. By this provision and arrangement the liquid fuel absorbed by the projecting portion S" of thewick member is carried up through the tube 5 in limited quantity and in a finely divided state, is prevented from accumulating to form a body of liquid therein, and is placed under fluid pressure entering freely at the opening 9, to force the said fuel, as a vapor, to and through the conduit 2. The conduit 2 leads to the union 10 through which the liquid and vapor passes to the tube 11 (Fig. 6) under the control of the valve 12 operated by the stem 1? and wheel 14. To regulate thelow of the Vapor to the mixer A15, and thence through the large conduit 16 to the lighting burner 17, a stem 18 extending through the tube and having a needle 19 at its inner end, is provided. The needle enters an orifice 20 in the hollow block 21, and under the control of the operator through the wheel 22, regulates the escape of the vapor from the tube 11 and also frees the small passage 20 of carbon or other foreign matter tending to clog the same.

To ignite the lighter the valve 12 is opened, permitting a small quant-ity of vapor, to pass to the lighting burner 17, and a lighted match or the like applied to the mouth of this burner. The llame issuing from the lighting burner 17 heats the vapor or liquid, in the small chamber 23 (Fig. 6) of the primary burner valve l() and causes it to issue thence to the burner or burners in communication 2" Vy Y 1,796,767

heating. chamber 2,5 andcauses a, siiflicient supply of vapor. under pressnre, to support' full combustibn in all burners to issue therefrom. The valve 12 may then be closed to extinguish the. lighter.

rl`he mixer 15 for. the. lighting.burner` may be of any serviceable construction, but as here shown, consistsy of a shutter 15 coveringthe mouth of the conduit 16 a plate l5, con; trolled by a set screw E26, so that it hmay be kmoved toward or from the,` said mouth to regulate the volume. of air admitted. for. ad-Y mixtuige with the` vapor.v manufacturer can adinet this shutter so as to provide a.

proper air supply and.' it need not thereafter' he adjusted, yThe 17 at bottom of the lighting burner. will., catch and hold condensed vapor, ivhilch wvil'lvbe consunied when the said burner is lighted and a small vent 16 in theI conduit 16, just aboye the level of the bowl, provides, an, overflow Which will 'prevent the accumulation. of a large volume of fuel in theliighter, permitting to eseape therefrom very slowly. This proyislon, hoivever, is not required except inE very unusual circumstances.

From the foregoing description of the lighting device it will be seenA thatonlyl a very small quantity of. fuel is permitted, to

' pass from the tanl; to the lighter that this liu-el is carefully regulated and controlled: and safeguarded; against all conditions tending to causeundesirablel resultsand thfatthe parts controlling the4v lighter and its fuel, supply areall vxedinposition andso oonstnucted and arranged thatthey cannoty accidentally give rise to. anything but the production. of the. i'iame required for the lig'hiting4 the burners.l lt will also bey seenA that tl-,ielighting operation requires only 'the turning of. a

f? valve, andl the application of a,y match', and

annular grooves can be performed safely by. any iviers'on of ordinary intelligence, and Without knowledge ofthe construction or operation of'v thev p arts or the explosive characterof tliefuel. I

The tube 5 is preferably provided with 5., by poening, orother- Wise, toA compress the, absorbent therein and control the fluid passing.. therefrom and mix,- ing with the compressed air.admittedthere- ""f to',"so that a. combustible and.v notover saturated mixture is supplied tofthelighter.

The. fuel supply pipe3- leads to the tubular chamber.Qflilled'ivith an absorbent Q8, and the'fuel passes through said: pipe and. to and "through the said chamber under, the pressure ofi the reservoir,- thencey through the spiral channel 29 formed by the grooyedrod; 30 in the tube 31,through the curved bore in the connecting member 33 downto the chain 55 ber 23, from whence it passes to the burners.

unider compression the absorbent 28, the disc being clamped in position by the. end of; said d tul'ie.VVA The Adisc'34'has acentralopening 34 for the passage of the fuel to the spiral channel 29, the rod. 30, in, which the spiral.

groove isoforms/d', has. its, .ends Sieht.. @S ilidicated at to admit the fuel to said groove at one end and permit it to pass out at the other. As indicated in Figure 1, the tube 31, defining pre-heating chamber 25, extends over the ,topY of the central burner 24, and is therefore exposed tothe heat of the burner Which causes the fuel passing through it to be` thoroughly vaporized and pre-heated and raises its pressure to a degree sufficient to force it intothe burner. l

rlhe entrane chamber 23 communicates through. the bore 35 ivith thenozzle 3 6 which discharges the vaporized fuel into the conduit 37, from whence it passes through the inlet 38 toV the bottoni of the burner 24', issuing thence through the perforated diaphiagml 39. through. the slittedy capor cover of thatburner, the said burner being provided, with. i cap similar to the other biirners but not shown inE the drawings, Thel perforated diaphragm 39 is supported above the bottoni of the burner bowl. so4 that a space isi provided beneath it for the even distribution oft-,1.1.6, vapor be seenztherefore that the valve 4Q, 41 controls the supply of vapor to alltheburners. vThis valve is provided vvithV a stem 47 extending beyond tli'eplug, and at the endof this stein is a needle 48, for cleaningv out the nozzle 36, The valyes controlling the flow of 'vapor through the conduits 44, 44a, and 45 are` of substantial/ ly the same construction! the main valve, andE are provided, with nozzles similar to, 36 and stems andf iieedlessimilar to 47 and 48. They are controlled by rods 4 9 and handles 50. and tliemain valveis 0136.1

ated theJ rodv 51v and, handle, 5,2.` These valves andthe parts connected..l therewith are of ordinary construction, andfservetocontrol th@ IQWO Uel, soas to,r,egulate theflaineof the biufnesybyl reeulatns .the size of the valveorilice and also restrictiiig the nozzle opening by means oftheir needles, in the usual manner, and it will be seen that the fiame of the primary burner may be greatly reduced Without cutting oil the supply of vapor to the other burners or reducing it to any material extent.

,The stems 49 of the valves controlling the supply of fuel to the side burners are disposed atan angle of approximately 45 degrees to the stem of the main Valve, and are of suicient length to bring their handles 50 to a position opposite their respective burners at the front of the stove. In this manner it is possible to have the valves located centrally and their operating Wheels located substantially in line with the burners controlled thereby, so that there can be no mistake on the part of the operator as to which burner is controlled by each valve Wheel,

which might occur if the controls were all i grouped at the center of the stove.

In operating the stove the lighter valve is i i first opened and the lighting burner ignited to heat the main vapor supply conduits of the burners, and on account of the construc- 'tion and arrangement of the present iinprovements this is easily accomplished, and the operation of the lighter at the front of the stove is easily observed. The main valve is then opened and the central burnerI lighted. The valves for the side burners may then be opened and these burners lighted, or one of the side burners only may be lighted. After this is done the combustion of all three burners may be shut off by the main valve or regu-` lated separately through the respective valves, the positions of the valves indicating at all times which one is to be manipulated to control the combustion of any one of the burners.

I claim:

l. The combination of a liquid fuel reservoir, a plurality of burners including a main burner, a fuel supply pipe leading from said reservoir to said main burner, and a plurality of ducts for supplying fuel to said burners, said ducts communicating With said pipe and extending from front to back of said main burner and in close proximity thereto, a single valve controlling the How of fuel from said pipe to the ducts, and a laterally extending valve means additionally controlling said flow to one duct.

2. In a vapor stove, a plurality of spaced burners, a fuel supply pipe, a valve thereon, ducts leading from said pipe to the burners and passing from front to back of one of said burners, valves at the front of said lastnamed burner controlling the fuel supply to each burner, said valves having operating rods extending outwardly to positions oppo site their respective burnersf 3. In a vapor stove, the combination of a plurality of burners spaced apart, a fuel supply conduit extending over one burner, a fuel reservoir, a valve for controlling the flow of 

